What is the Greatest Common Factor of 81270 and 81279?

Greatest common factor (GCF) of 81270 and 81279 is 9.

GCF(81270,81279) = 9

We will now calculate the prime factors of 81270 and 81279, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81270 and 81279.

How to find the GCF of 81270 and 81279?

We will first find the prime factorization of 81270 and 81279. After we will calculate the factors of 81270 and 81279 and find the biggest common factor number .

Step-1: Prime Factorization of 81270

Prime factors of 81270 are 2, 3, 5, 7, 43. Prime factorization of 81270 in exponential form is:

81270 = 2¹ × 3³ × 5¹ × 7¹ × 43¹

Step-2: Prime Factorization of 81279

Prime factors of 81279 are 3, 11, 821. Prime factorization of 81279 in exponential form is:

81279 = 3² × 11¹ × 821¹

Step-3: Factors of 81270

List of positive integer factors of 81270 that divides 81270 without a remainder.

1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 43, 45, 54, 63, 70, 86, 90, 105, 126, 129, 135, 189, 210, 215, 258, 270, 301, 315, 378, 387, 430, 602, 630, 645, 774, 903, 945, 1161, 1290, 1505, 1806, 1890, 1935, 2322, 2709, 3010, 3870, 4515, 5418, 5805, 8127, 9030, 11610, 13545, 16254, 27090, 40635

Step-4: Factors of 81279

List of positive integer factors of 81279 that divides 81270 without a remainder.

1, 3, 9, 11, 33, 99, 821, 2463, 7389, 9031, 27093

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81270 and 81279. The biggest common factor number is the GCF number.
So the greatest common factor 81270 and 81279 is 9.

Also check out the Least Common Multiple of 81270 and 81279